Star support for the West Memphis 3

From left, Joe Berlinger, Jason Baldwin and Bruce Sinofsky arrive at the 84th Annual Academy Awards held at the Hollywood & Highland Center on Feb. 26, 2012, in Hollywood, Calif.

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Filmmaker Joe Berlinger hugs Jason Baldwin at the Cinema for Peace Gala ceremony at the Konzerthaus Am Gendarmenmarkt during the 62nd Berlin International Film Festival on Feb, 13, 2012, in Berlin, Germany.

Credit: Andreas Rentz/Getty Images for Cinema For Peace

From left, Amy Berg, director and screenwriter of the documentary film "West of Memphis"; producers Damien Echols and wife Lorri Davis, and producer Peter Jackson, at the premiere of the film at the 2012 Sundance Film Festival in Park City, Utah, Friday, Jan. 20, 2012.

Credit: AP Photo/Chris Pizzello

The West Memphis 3, Jessie Misskelley Jr., left, Damien Echols, center, and Jason Baldwin, attend a special screening of "Paradise Lost 3: Purgatory" during the 49th Annual New York Film Festival at Alice Tully Hall on Oct. 10, 2011, in New York. The film was nominated for an Academy Award.

Credit: AP Photo/Evan Agostini

Jessie Misskelley Jr. attends the 49th annual New York Film Festival presentation of "Paradise Lost 3: Purgatory" at Alice Tully Hall, Lincoln Center on Oct. 10, 2011, in New York.

Eddie Vedder of the rock band Pearl Jam, left, embraces Damien Echols, one of three men released Friday, Aug. 19, 2011, at the Craighead County Court House in Jonesboro, Ark., after pleading guilty to crimes they say they did not commit. The three men, dubbed the West Memphis 3, convicted of killing three 8-year-old Cub Scouts and dumping their bodies in an Arkansas ditch in 1993, were freed from nearly two decades in prison Friday, after they agreed to plead guilty to secure the release Echols from death row. Vedder became a key supporter of the men after watching a pair of documentaries about the case.

Credit: AP/Danny Johnston

The cause of the West Memphis 3 was taken up by activist groups across the country, and championed by celebrities such as Pearl Jam front-man Eddie Vedder, left, and Dixie Chicks singer Natalie Maines, right, seen here with Lorri Davis, center, wife of Damien Echols, at a news conference before the "Voices for Justice" concert on behalf of the imprisoned trio in Little Rock, Ark. on Saturday, Aug. 28, 2010.

Vedder, Davis and Maines were in Jonesboro, Ark., on Friday, Aug. 19, 2011, when Echols, Jason Baldwin and Jessie Misskelley - convicted of killing three 8-year-old Cub Scouts and dumping their bodies in an Arkansas ditch in 1993 - were freed after 18 years in prison.

Maines tweeted: "The gag order has been lifted, so now I can tell you, I'm sitting in a holding room at the courthouse about to see three men walk free!"

Credit: AP Photo

Actor Johnny Depp addresses the crowd at the Voices for Justice concert in Little Rock, Ark. Saturday, Aug. 28, 2010, in support of three Arkansas men convicted of the 1993 deaths of three West Memphis boys.

In an interview with "48 Hours Mystery," Depp talks about why he believes in the innocence of the trio convicted as teens of the the brutal murders of three 8-year-old boys in Arkansas.

"They were easy targets... Every single piece of evidence points to their innocence, not to their guilt," Depp says. "People need to stand up and say, yeah, it's time to find the real killers. Let's find justice."

Credit: AP Photo/Brian Chilson

Pearl Jam frontman Eddie Vedder performs at the Voices for Justice concert in Little Rock, Ark. Saturday Aug. 28, 2010, in support of three Arkansas men convicted of the 1993 deaths of three West Memphis boys. He was among the artists who performed on a benefit album in 2000, titled, "Free the West Memphis 3." Vedder also co-wrote a song with death row inmate Damien Echols called "Army Reserve," which is on the band's 2006 album, "Pearl Jam."

Credit: AP Photo/Brian Chilson

Musicians Joseph Arthur, left, Dhani Harrison, center, and Ben Harper, right, perform Saturday Aug. 28, 2010, in Little Rock, Ark. in the Voices for Justice concert in support of three Arkansas men convicted of the 1993 deaths of three West Memphis boys.

Credit: AP Photo/Brian Chilson

Outspoken Dixie Chicks lead singer Natalie Maines, right, chats with Lorri Davis, wife of Arkansas death row inmate Damien Echols in Little Rock, Ark., Wednesday, Dec. 19, 2007, after the two women spoke on behalf of an organization seeking release or new trials for Echols and two other inmates known as the West Memphis Three.

Credit: AP Photo/Danny Johnston

On Jan. 13, 2010, Disney actress Demi Lovato showed her support for the group via Twitter: "Can everyone just take a second to read this please. www.wm3.org a truly worth while cause. Show your support!!! FREE THE WEST MEMPHIS THREE!!! :(

Credit: AP

Actor Jack Black is among the celebrities who have shown support for Jason Baldwin, Damien Echols and Jessie Misskelley Jr., who were convicted of the murders of three 8-year-old boys in Arkansas in 1993. The trio, known as the West Memphis Three, have gained widespread celebrity support. Many believe the trio were wrongly convicted because there is no physical proof of their guilt.

Credit: AP Photo/Mark J. Terrill

Actress and activist Margaret Cho has visited the West Memphis 3 in prison. Here she poses for an American Library Association poster in which she holds a copy of Echol's book, "Almost Home: My Life Story Vol 1."

Credit: MargaretCho.com

Actress Winona Ryder has supported the attempts to obtain a retrial for the West Memphis 3. In 2003, she hosted a benefit art exhibition titled "Cruel And Unusual," which marked the 10th anniversary of the arrests of the trio on June 3, 1993. Proceeds benefitted the WM3 legal defense fund.

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Punk rock icon Henry Rollins is known for speaking his mind. He's actively supported the release of the West Memphis Three, and in 2002, organized a benefit album, "Rise Above: 24 Black Flag Songs to Benefit the West Memphis Three." Album proceeds aided the WM3 legal defense fund.

"South Park" creators Matt Stone, left, and Trey Parker pose for a photo in 2000. That same year, Parker brought attention to cause, exclaiming "Free the West Memphis Three!" on stage after accepting an MTV movie award.